AMBC vs AGO

For growth investors, Ambac Financial Group, Inc.

(AMBC) is the stronger pick with 89. 1% revenue growth year-over-year, versus -19. 8% for Assured Guaranty Ltd. (AGO). Ambac Financial Group, Inc. (AMBC) offers the better valuation at 4. 3x trailing P/E (92. 0x forward), making it the more compelling value choice. Analysts rate Ambac Financial Group, Inc. (AMBC) a "Buy" — based on 6 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

On trailing P/E, Ambac Financial Group, Inc.

(AMBC) is the cheapest at 4. 3x versus Assured Guaranty Ltd. at 11. 9x. On forward P/E, Assured Guaranty Ltd. is actually cheaper at 12. 4x — notably different from the trailing picture, reflecting expected earnings growth.

Over the past 5 years, Assured Guaranty Ltd.

(AGO) delivered a total return of +71. 8%, compared to -65. 3% for Ambac Financial Group, Inc. (AMBC). Over 10 years, the gap is even starker: AGO returned +247. 7% versus AMBC's -60. 8%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), Assured Guaranty Ltd.

(AGO) is the lower-risk stock at 0. 45β versus Ambac Financial Group, Inc. 's 0. 78β — meaning AMBC is approximately 75% more volatile than AGO relative to the S&P 500. On balance sheet safety, Ambac Financial Group, Inc. (AMBC) carries a lower debt/equity ratio of 13% versus 31% for Assured Guaranty Ltd. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Ambac Financial Group, Inc.

(AMBC) is pulling ahead at 89. 1% versus -19. 8% for Assured Guaranty Ltd. (AGO). On earnings-per-share growth, the picture is similar: Assured Guaranty Ltd. grew EPS -44. 1% year-over-year, compared to -60. 5% for Ambac Financial Group, Inc.. Over a 3-year CAGR, AGO leads at 5. 3% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

Assured Guaranty Ltd.

(AGO) is the more profitable company, earning 46. 2% net margin versus -236. 0% for Ambac Financial Group, Inc. — meaning it keeps 46. 2% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: AGO leads at 60. 0% versus -25. 4% for AMBC. At the gross margin level — before operating expenses — AGO leads at 100. 7%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

On forward earnings alone, Assured Guaranty Ltd.

(AGO) trades at 12. 4x forward P/E versus 92. 0x for Ambac Financial Group, Inc. — 79. 7x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for AMBC: 128. 4% to $14. 00.

In this comparison, AGO (1.

5% yield) pays a dividend. AMBC does not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, Assured Guaranty Ltd.

(AGO) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 45), 1. 5% yield, +247. 7% 10Y return). Both have compounded well over 10 years (AGO: +247. 7%, AMBC: -60. 8%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

Both stocks operate in the Financial Services sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: AMBC is a small-cap high-growth stock; AGO is a small-cap deep-value stock. AGO pays a dividend while AMBC does not, making them suitable for different income and tax situations. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.